DE102018110391A1 - Truck-mounted concrete pump and swivel leg for a truck-mounted concrete pump - Google Patents

Abstract

The invention relates to a truck-mounted concrete pump with at least one front and at least one rear pivot leg, wherein the pivot legs are coupled to a substructure of the truck-mounted concrete pump via an upper and a lower pivot pin part with a common pivot axis. The invention is further directed to a corresponding pivot leg for a truck-mounted concrete pump.

Description

The invention relates to a truck-mounted concrete pump with at least one front and at least one rear pivot leg, wherein the pivot legs are coupled to a substructure of the truck-mounted concrete pump via an upper and a lower pivot pin part with a common pivot axis.

It is known from the prior art for truck-mounted concrete pumps that components of the rear and front pivot legs and of the front telescopic leg have overlapping and interlocking sections. For this purpose, the components mentioned must be designed or arranged in staggered height. In this case, the rear pivot leg, the front pivot leg and the front telescopic leg are usually arranged vertically offset from each other in this order.

Essentially, this staggering of the overall height or of the individual components serves the purpose of being able to connect the rear and front pivot legs by means of the two pivot pin parts to the common pivot axis at all, while the front telescopic leg penetrates them. The split pivot pin usually comprises two separate bolts or bolt parts, which are arranged coaxially and vertically offset from each other.

In order to achieve the leg length necessary for the safe state of the machine during operation, it is necessary to make the front pivot leg telescopic in such a way that the telescopic leg in the telescoped and pivoted state projects beyond the front pivot leg to the rear and through the pivot axis in the space of rear pivot leg penetrates. The overlapping and interlocking of the components of respective substructures requires that the rear pivot leg, the front pivot leg and the front telescopic leg are staggered in their height, usually in the order mentioned above. Essentially, the staggering of the height serves the purpose of being able to connect the rear and front pivot leg by means of a split pivot pin at all to the pivot axis, while the front telescopic leg penetrates them.

Since predominantly vertical loads act on the support legs of a mobile truck-mounted concrete pump with a distribution boom, the height-height graduation of the pivoting legs and of the telescopic leg described above necessarily entails a deterioration or reduction of the component dimensions in the loading direction. In common substructures of truck-mounted concrete pumps such as so-called XXT-substructures, ie substructures in which a front and a rear pivot leg are articulated on a common, shared pivot pin, especially the front leg parts of the burden because actually as high and narrow running to be able to safely absorb the burdens they absorb. However, this high design of the leg parts is limited by the available height or the amount of available space. As a result, the components are much heavier due to this limitation or the corresponding storage conditions on the pivot axis and thus uneconomical than they should actually be.

Against this background, it is the object of the invention to provide an improved truck-mounted concrete pump in which the pivoting legs are better adapted to the loads transmitted by them. In this case, the front and rear pivot legs of the truck concrete pump should be mounted on a common pivot axis so that the power flow is derived from the distribution boom in the support legs as directly as possible and in the smallest space.

The object is achieved by a truck-mounted concrete pump with the features of claim 1 and by a pivot leg for a truck-mounted concrete pump with the features of claim 10. Advantageous embodiments are the subject of the dependent claims.

Accordingly, a truck-mounted concrete pump with at least one front and at least one rear pivot leg is provided, wherein the pivot legs are coupled to a substructure of the truck-mounted concrete pump via an upper and a lower pivot pin part with a common pivot axis. At least one of the pivot legs may comprise a telescopic leg or coupled with a telescopic leg.

According to the invention, it is provided that the pivoting legs are coupled to the upper pivot pin part via a respective contact surface which does not surround the upper pivot pin part completely. This contact surface may for example be designed in the form of a partial cylinder shell and accordingly has a part-circle-like cross section, or is made from a partial cylinder section or partially cylindrical section. Thus, in contrast to the prior art, the upper pivot pin part is not coupled to the pivot legs via ring-shaped contact surfaces which fully surround the upper pivot pin part. Rather, the inventively provided contact surface surrounds the upper pivot pin part only partially and not fully.

According to the invention thus the predominant loading direction of the support legs mobile concrete pump and the usual pivot angle of the front and rear pivot legs of the substructures are used in a way that allows a height-technically advantageous Schwenkbeinanlenkung.

Since the support legs of all mobile concrete pumps predominantly defy the gravitational forces on the machine during operation, opposing forces act from the bottom to the top in the associated support cylinders. The support legs of a mobile concrete pump behave like a cantilevered on the pivot axis cantilever, acting on the end of the supporting force against the earth's gravity.

Consequently, the underside of such a support leg is predominantly tensile load, the top on pressure. While today's swivel legs and in particular XXT-substructures surround the pivot axis forming split pivot pin top and bottom annular, the invention now provides in the printing area in the region of the upper pivot pin part of Schwenkbeinanlenkung now only a part-circular or teilzylindermantelförmige contact surface before, while according to the prior art a Pivot pin part completely or completely enclosing ring is present.

Since the swivel angle of the front pivot leg need not overlap with those of the rear pivot leg, this approach makes it possible in the pressure range of the two legs to perform the upper pivot pin steering instead of height offset at the same height. The resulting gain in the available height can be used for load-balanced dimensioning usually the front pivot leg and the telescopic leg running therein. So that the legs do not fall down when driving, it only needs a very small, not jib-relevant fuse. However, it is still possible to perform the upper Schwenkbolzenanlenkung height offset.

In a preferred embodiment of the invention, it is conceivable that the upper contact surfaces of the two pivoting legs are formed the same height and / or at the same height. With an equally high design of the contact surfaces correspondingly thick sheets or other similar components can be used to produce the contact surfaces. Since the contact surfaces can also be arranged in the same height or height of the truck concrete pump, it is possible to use the maximum vertical space for the execution of the associated with the contact surfaces pivoting legs.

In a further preferred embodiment, it is conceivable that the pivot bolt links of the pivoting legs which are adjacent to the contact surfaces are of the same height and / or the same height as the contact surfaces. The Schwenkbolzenanlenkungen may be parts of upper straps or upper portions of the pivot legs, and may alternatively or additionally be formed integrally with the contact surfaces.

In a further preferred embodiment, it is conceivable that the contact surfaces and / or the Schwenkbolzenanlenkungen are arranged according to claim 3 at the same height as a connection of the substructure. The sections or components mentioned may all or at least partially overlap in the vertical direction or in the height direction. The connection of the substructure may be that part of the substructure which is indirectly or directly coupled to the pivot pin.

In a further preferred embodiment, it is conceivable that a fuse is provided which is adapted to fix the pivoting legs in a driving position in which the pivoting legs do not support the truck-mounted concrete pump against the ground on the truck-mounted concrete pump.

In the state of the swivel legs, which is not or slightly loaded in the driving position, the swivel legs are not pressed or not enough on the swivel pins, so that a corresponding securing makes possible an at least partial locking of the swivel legs to the truck-mounted concrete pump.

In a further preferred embodiment, it is conceivable that the contact surfaces correspond to a cylinder jacket sector with a center angle of between 45 ° and 90 °. Of course, the abutment surfaces can deviate from the shape of a perfect cylinder jacket sector or be connected to adjacent geometries or adjacent thereto, which geometries can also be regarded as part of the abutment surfaces.

The abutment surfaces may, as mentioned above, be made in one piece with other components of the pivoting legs and comprise or comprise a corresponding cylinder jacket sector.

In a further preferred embodiment, it is conceivable that the contact surfaces border on bevels of the respective pivot legs. The chamfers can, viewed from above, run from lateral areas of the pivoting legs to the contact surfaces. The chamfers of a pivot leg can be designed asymmetrically, with an internal chamfer be made larger or longer can as one of these opposite outer bevel. The term chamfer is to be understood broadly herein and may include any inclined portions of the pivot legs. The chamfers do not necessarily have to be provided. The pivoting bees must be designed so that the two pivoting areas of the rear and the front pivot leg do not overlap each other.

In a further preferred embodiment, it can be provided that the pivoting legs in each case enclose the lower pivot pin part in an annular manner. In this way it can be ensured that tensile loads in the lower part of the pivoting legs are transmitted via the annular portion of the pivoting legs in the lower pivot pin parts.

In a further preferred embodiment, it is conceivable that lower pivot pin linkages are formed differently high and / or at different heights. In this way, we simplified the annular embrace of the lower pivot pin parts and thus the tensile force transmission in this area of the construction.

The invention is further directed to a swing leg for a truck-mounted concrete pump according to any one of claims 1-9, wherein the pivot leg has at least one of the features mentioned in connection with the pivot legs of the truck-mounted concrete pump according to claims 1-9.

• 1: eine schematische Teilansicht der Schwenkbeine einer erfindungsgemäßen Autobetonpumpe;
• 2: eine schematische Teildraufsicht einer Autobetonpumpe, bei der eine erfindungsgemäße und eine aus dem Stand der Technik bekannte Ausführung kombiniert sind; und
• 3: eine schematische Teilansicht der Schwenkbeine einer aus dem Stand der Technik bekannten Autobetonpumpe.

Further details and advantages of the invention are explained with reference to the exemplary embodiments shown in the figures. Showing:

• 1 a schematic partial view of the pivot legs of a truck-mounted concrete pump according to the invention;
• 2 : A schematic partial plan view of a truck-mounted concrete pump, in which an inventive and known from the prior art embodiment are combined; and
• 3 : A schematic partial view of the pivot legs of a known from the prior art truck-mounted concrete pump.

1 shows a schematic side view of two pivot legs 2 . 3 one in 2 indicated truck-mounted concrete pump 1 , paying special attention to the connection of the two pivoting legs 2 and 3 via a pivot axis 4 to a substructure 5 the truck-mounted concrete pump 1 is directed.

The front pivot leg 2 and the rear pivot leg 3 are about the common pivot axis 4 and the two-part pivot pin 6 swiveling with the substructure 5 coupled. The two-part pivot pin 6 includes an upper pivot pin part 61 and a lower pivot pin part 62 coaxial with and spaced from each other on the substructure 5 the truck-mounted concrete pump 1 are arranged. Both swing legs 2 . 3 connect the substructure 5 with support cylinders 9 , Under load act at the top of the swing legs 2 . 3 Pressure forces, while in the lower area tensile forces act. These are indicated by corresponding arrows.

The substructure 5 includes in particular a mast block of the truck-mounted concrete pump 1 , at the mast of the truck-mounted concrete pump 1 is arranged.

According to the invention it is provided that the two pivot legs 2 . 3 with the upper pivot pin part 61 each have an upper part-cylinder shell-shaped contact surface 21 . 31 are coupled. Although 1 only two swivel legs 2 . 3 shows, the truck-mounted concrete pump according to the invention can also more than two corresponding pivoting legs 2 . 3 include. Usually, the truck-mounted concrete pump 1 four swivel legs 2 . 3 each of which includes two left and two right relative to the longitudinal axis of the truck-mounted concrete pump 1 are arranged. The left pivot legs 2 . 3 Of course, you can use other pivot pin parts 61 . 62 be coupled with the substructure, as the right pivot pin parts 61 . 62 ,

As in 1 can be seen, the upper contact surfaces 21 . 31 the two pivot legs 2 . 3 be the same height and / or the same height. The same height means the same height based on the vertical orientation or on the ground of the truck-mounted concrete pump 1 ,

The contact surfaces 21 . 31 adjacent Schwenkbolzenanlenkungen 22 . 32 , the swinging legs 2 . 3 may alternatively or additionally be the same height and / or the same height.

Additionally or alternatively, it is conceivable that the contact surfaces 21 . 31 and / or the Schwenkbolzenanlenkungen 22 . 32 are formed at the same height and / or the same height as a connection 51 of the substructure 5 ,

It may also be provided an unspecified fuse, which is adapted to the pivot legs 2 . 3 in a driving position in which the pivot legs 2 . 3 do not support the truck-mounted concrete pump against the ground, on the truck-mounted concrete pump 1 to fix. 1 further shows that a telescopic leg 8th displaceable relative to the front pivot leg can be mounted on this.

Like the lower part of the 2 can be removed, the contact surfaces of the invention 21 . 31 a cylinder jacket sector with a center angle of 20 ° to 180 ° and in particular from 45 ° to 90 ° correspond. The opposite is in the upper section of the 2 a state-of-the-art design of the truck-mounted concrete pump 1 opposite, in which it can be seen that the pivot pin 6 annular and complete of the pivot legs 2 . 3 be enclosed.

The lower section of the 2 is also removable, that the contact surfaces 21 . 31 at chamfers of the respective pivot legs 2 . 3 limits. The chamfers allow the collision-free pivoting of the pivoting legs 2 . 3 against each other in an angular range determined by the angle of the chamfers. The term chamfers is to be interpreted broadly and can refer to any geometry that allows the principle of collision-free pivoting of the pivot legs. Of course, other sections can also swing legs 2 . 3 be designed or trained so that their collision-free as possible pivoting is guaranteed.

3 shows a side view of a known from the prior art truck-mounted concrete pump, wherein compared with the in 1 can be seen, that due to the staggered arrangement of the components in the region of the upper pivot pin part 61 the front pivot leg 2 and the telescopic leg guided in it 8th have a lower height h than the height H of the truck-mounted concrete pump according to the invention 1 out 1 ,

As can be seen from the comparison of 1 and 3 gives the height h, which according to the in 3 Prior art shown for the front pivot leg 2 available is less than the height H which according to 1 for the front pivot leg 2 is available. This allows the front pivot leg 2 According to the invention be executed in the loading direction more rigid and lighter than is the case according to the prior art.

Claims (10)

Truck-mounted concrete pump (1) having at least one front and at least one rear pivot leg (2, 3), the pivot legs (2, 3) being connected to a substructure (5) of the truck-mounted concrete pump (1) via an upper and a lower pivot pin part (61, 62). with a common pivot axis (4) are coupled, characterized in that the pivot legs (2, 3) with the upper pivot pin part (61) via a respective upper pivot pin part (61) not fully encompassing, in particular teilzylindermantelförmige, upper contact surface (21, 31) are coupled. Truck-mounted concrete pump (1) after Claim 1 , characterized in that the upper abutment surfaces (21, 31) of the two pivoting legs (2, 3) are formed the same height and / or at the same height as the contact surfaces. Truck-mounted concrete pump (1) after Claim 1 or 2 , characterized in that the abutment surfaces (21, 31) adjacent Schwenkbolzenanlenkungen (22, 23) of the pivoting legs (2, 3) are formed equally high and / or at the same height. Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that the abutment surfaces (21, 31) and / or the Schwenkbolzenanlenkungen (22, 23) after Claim 3 are arranged at the same height as a connection (51) of the substructure (5). Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that a fuse is provided which is adapted to the pivoting legs (2, 3) in a driving position in which the pivoting legs (2, 3) the truck-mounted concrete pump (1) not bear against the ground, fix on the truck-mounted concrete pump (1). Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that the contact surfaces (21, 31) correspond to a cylinder jacket sector with a center angle of between 20 ° and 180 °, in particular between 45 ° and 90 °. Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that the contact surfaces (21, 31) border on bevels of the respective pivoting legs (2, 3). Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that the pivoting legs (2, 3) each enclose the lower pivot pin part (62) in an annular manner. Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that lower pivot pin linkages (22 ', 23') of different heights and / or are formed at different heights. Swivel leg (2, 3) for a truck-mounted concrete pump (1), characterized in that the swivel leg (2, 3) has at least one of the features which, in conjunction with the swivel legs (2, 3) of the truck-mounted concrete pump (1) according to Claims 1 - 9 are called.

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